From the Spaceflight Meteorology Group: Heavy rains are expected in the local area shortly. At 2:12 PM a strong thunderstorm was 1.5 miles west of JSC. Over 1 inch of rain has fallen with this storm as it moved through Friendswood. Between 1 and 1.25 inches of rain is likely in the next hour for JSC, NASA Ellington Field and SCTF. This may cause some brief minor ponding of water and street flooding on-site at the usual locations and near construction sites. Rain should be ending within 1 to 1.5 hours.
The National Weather Service has issued a Flash Flood Warning through 5:15 pm that includes JSC and the surrounding area.
Avoid low lying areas and do not drive into standing water.